Astrophysics – Page 157 – Kavli Institute Pre-Print Publications

The Intermediate-Mass Black Hole Reverberation Mapping Project: Initial Results for a candidate IMBH in a nearby Seyfert 1 Galaxy

Posted by dbos May 20, 2024Peking

Kavli Affiliate: Xuebing Wu | First 5 Authors: Wenwen Zuo, Hengxiao Guo, Jingbo Sun, Qi Yuan, Paulina Lira | Summary: To investigate the short-term variability and determine the size of the optical continuum emitting size of intermediate-mass black holes (IMBHs), we carried out high-cadence, multi-band photometric monitoring of a Seyfert 1 galaxy J0249-0815 across two […]

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Optical Continuum Reverberation Mapping of a Candidate IMBH in a Nearby Seyfert 1 Galaxy

Posted by dbos May 20, 2024Peking

Kavli Affiliate: Luis C. Ho | First 5 Authors: Wenwen Zuo, Hengxiao Guo, Jingbo Sun, Qi Yuan, Paulina Lira | Summary: To investigate the short-term variability and determine the size of the optical continuum emitting region of intermediate-mass black holes (IMBHs), we carried out high-cadence, multiband photometric monitoring of a Seyfert 1 galaxy J0249-0815 across […]

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Optical Continuum Reverberation Mapping of a Candidate IMBH in a Nearby Seyfert 1 Galaxy

Posted by dbos May 20, 2024Peking

Kavli Affiliate: Xuebing Wu | First 5 Authors: Wenwen Zuo, Hengxiao Guo, Jingbo Sun, Qi Yuan, Paulina Lira | Summary: To investigate the short-term variability and determine the size of the optical continuum emitting region of intermediate-mass black holes (IMBHs), we carried out high-cadence, multiband photometric monitoring of a Seyfert 1 galaxy J0249-0815 across two […]

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Adjacent Leader Decentralized Stochastic Gradient Descent

Posted by dbos May 18, 2024Peking

Kavli Affiliate: Jing Wang | First 5 Authors: Haoze He, Jing Wang, Anna Choromanska, , | Summary: This work focuses on the decentralized deep learning optimization framework. We propose Adjacent Leader Decentralized Gradient Descent (AL-DSGD), for improving final model performance, accelerating convergence, and reducing the communication overhead of decentralized deep learning optimizers. AL-DSGD relies on […]

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Symmetrically Threaded SQUIDs As Next Generation Kerr-cat Qubits

Posted by dbos May 18, 2024Peking

Kavli Affiliate: Ke Wang | First 5 Authors: Bibek Bhandari, Irwin Huang, Ahmed Hajr, Kagan Yanik, Bingcheng Qing | Summary: Kerr-cat qubits are bosonic qubits with autonomous protection against bit-flips. They have been studied widely using driven Superconducting Nonlinear Asymmetric Inductive eLement (SNAIL) oscillators. We theoretically investigate an alternate circuit for the Kerr-cat qubit, namely […]

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Sub-relativistic Outflow and Hours-Timescale Large-amplitude X-ray Dips during Super-Eddington Accretion onto a Low-mass Massive Black Hole in the Tidal Disruption Event AT2022lri

Posted by dbos May 18, 2024MIT

Kavli Affiliate: Erin Kara | First 5 Authors: Yuhan Yao, Muryel Guolo, Francesco Tombesi, Ruancun Li, Suvi Gezari | Summary: We present the tidal disruption event (TDE) AT2022lri, hosted in a nearby ($approx!144$ Mpc) quiescent galaxy with a low-mass massive black hole ($10^4,M_odot < M_{rm BH} < 10^6,M_odot$). AT2022lri belongs to the TDE-H+He subtype. More […]

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Large Neighborhood Prioritized Search for Combinatorial Optimization with Answer Set Programming

Posted by dbos May 18, 2024Tokyo

Kavli Affiliate: Naoyuki Tamura | First 5 Authors: Irumi Sugimori, Katsumi Inoue, Hidetomo Nabeshima, Torsten Schaub, Takehide Soh | Summary: We propose Large Neighborhood Prioritized Search (LNPS) for solving combinatorial optimization problems in Answer Set Programming (ASP). LNPS is a metaheuristic that starts with an initial solution and then iteratively tries to find better solutions […]

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The Empirical and Radiative Transfer Hybrid (EaRTH) Disk Model: Merging Analyses of Protoplanetary Dust Disk Mineralogy and Structure

Posted by dbos May 17, 2024MIT

Kavli Affiliate: David A. Principe | First 5 Authors: William Grimble, Joel Kastner, Christophe Pinte, Beth Sargent, David A. Principe | Summary: Our understanding of how exoplanets form and evolve relies on analyses of both the mineralogy of protoplanetary disks and their detailed structures; however, these key complementary aspects of disks are usually studied separately. […]

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Constraining possible $γ$-ray burst emission from GW230529 using Swift-BAT and Fermi-GBM

Posted by dbos Peking

Kavli Affiliate: Lijing Shao | First 5 Authors: Samuele Ronchini, Suman Bala, Joshua Wood, James Delaunay, Simone Dichiara | Summary: GW230529 is the first compact binary coalescence detected by the LIGO-Virgo-KAGRA collaboration with at least one component mass confidently in the lower mass-gap, corresponding to the range 3-5$M_{odot}$. If interpreted as a neutron star-black hole […]

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Wide Binary Orbits are Preferentially Aligned with the Orbits of Small Planets, but Probably Not Hot Jupiters

Posted by dbos May 16, 2024MIT

Kavli Affiliate: Andrew Vanderburg | First 5 Authors: Sam Christian, Andrew Vanderburg, Juliette Becker, Adam L. Kraus, Logan Pearce | Summary: Studying the relative orientations of the orbits of exoplanets and wide-orbiting binary companions (semimajor axis greater than 100 AU) can shed light on how planets form and evolve in binary systems. Previous observations by […]

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